SIP12108 Datasheet, PDF (1/18 Pages) Vishay Siliconix – Adjustable output voltage down to 0.6 V

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SiP12108, SiP12108A
Vishay Siliconix
2.8 V to 5.5 V Input
5 A Synchronous Buck Regulator
DESCRIPTION
The SiP12108 is a high frequency current-mode constant
on-time (CM-COT) synchronous buck regulator with
integrated high-side and low-side power MOSFETs. Its
power stage is capable of supplying 5 A continuous current
at 4 MHz switching frequency. This regulator produces an
adjustable output voltage down to 0.6 V from 2.8 V to 5.5 V
input rail to accommodate a variety of applications,
including computing, consumer electronics, telecom, and
industrial.
SiP12108’s CM-COT architecture delivers ultra-fast
transient response with minimum output capacitance and
tight ripple regulation at very light load. The part is stable
with any capacitor type and no ESR network is required for
loop stability. The device also incorporates a power saving
scheme that significantly increases light load efficiency.
The SiP12108 integrates a full protection feature set,
including output overvoltage protection (OVP), output under
voltage protection (UVP) and thermal shutdown (OTP). The
“A” version of the device, SiP12108A, does not have the
UVP feature. They also incorporate UVLO for the input rail
and an internal soft-start ramp.
The SiP12108 is available in lead (Pb)-free power enhanced
3 mm x 3 mm QFN-16 package.
FEATURES
• 2.8 V to 5.5 V input voltage
• Adjustable output voltage down to 0.6 V
• 5 A continuous output current
• Programmable switching frequency up to 4 MHz
• 95 % peak efficiency
• Stable with any capacitor. No external ESR
network required.
• Ultrafast transient response
• Selectable power saving (PSM) mode or forced
continuous mode
• ± 1 % accuracy of V_OUT setting
• Pulse-by-pulse current limit
• Scalable with SiP12107 - 3 A
• SiP12108 is fully protected with OTP, SCP, UVP, OVP
• SiP12108A is fully protected with OTP, SCP, OVP
• PGOOD Indicator
• PowerCAD Simulation software available at
vishay.transim.com/login.aspx
• Material categorization: For definitions of compliance
please see www.vishay.com/doc?99912
APPLICATIONS
• Point of load regulation for low-power processors,
network processors, DSPs, FPGAs, and ASICs
• Low voltage, distributed power architectures with
3.3 V or 5 V rails
• Computing, broadband, networking, LAN/WAN, optical,
test and measurement
• A/V, high density cards, storage, DSL, STB, DVR, DTV,
Industrial PC
TYPICAL APPLICATION CIRCUIT
POWER SAVE MODE
ENABLE
POWER GOOD
INPUT = 2.8 V to 5.5 V
PGOOD EN AUTO
V_IN
LX
V_OUT
V_OUT
AV_IN
P_GND
A_GND
V_FB
GMO
R_ON
Fig. 1 - Typical Application Circuit for SiP12108
S13-2257-Rev. B, 11-Nov-13
1
Document Number: 62699
For technical questions, contact: [e-mail]
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000